CN214320176U - Abandonment active carbon's behind absorption VOCs device of dealing with on spot - Google Patents
Abandonment active carbon's behind absorption VOCs device of dealing with on spot Download PDFInfo
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- CN214320176U CN214320176U CN202023000920.3U CN202023000920U CN214320176U CN 214320176 U CN214320176 U CN 214320176U CN 202023000920 U CN202023000920 U CN 202023000920U CN 214320176 U CN214320176 U CN 214320176U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The utility model discloses an abandonment active carbon's behind absorption VOCs processing apparatus on spot, the device include draught fan, heat exchanger, unloader, desorption tower, electric heater, catalytic reactor and chimney, and all equipment are all installed in the removal square under-deck. The processing method comprises the following steps: the method comprises the steps of utilizing hot air to desorb waste activated carbon, heating generated organic waste gas to a catalysis temperature through an electric heater, enabling the organic waste gas to enter a catalytic reactor, preheating waste gas entering a system next time through catalyzed high-temperature tail gas, and finally discharging the tail gas from a chimney through a draught fan. The device's advantage is, whole system height integration is in a removal shelter, and equipment is small, safe and reliable, can remove fast to each factory VOCs adsorption facilities by, handles abandonment active carbon on the spot, and the active carbon after the regeneration is used again, does not have secondary pollution.
Description
Technical Field
The invention belongs to the field of dangerous solid waste treatment, and particularly relates to a safe treatment device for a waste activated carbon adsorbent.
Technical Field
A large amount of aromatic hydrocarbon organic matters mainly containing benzene series are discharged in the production processes of petrochemical industry, industrial coating, printing and other industries, typical flue gas is characterized by large flue gas amount and low concentration, and an adsorption-concentration-catalysis (combustion) process is usually adopted for treatment, so that the process is relatively complex and the investment cost is high. Due to the cost problem, enterprises generally adopt disposable activated carbon adsorption devices in practice, and a large amount of activated carbon hazardous waste is generated. Due to the numerous and dispersed discharge points of VOCs, the transportation and disposal of waste activated carbon has become a new problem to be solved urgently in the industry.
Disclosure of Invention
In order to solve the problems, the utility model develops the activated carbon recycling and regeneration treatment technology and device of the desorption-catalytic combustion combined process, which are highly integrated in the movable shelter to realize the quick, safe and on-site treatment of the dangerous waste of the activated carbon.
The technical scheme of the utility model as follows:
a local disposal device for waste activated carbon after absorbing VOCs comprises a draught fan, a primary heat exchanger, a secondary heat exchanger, a discharger, a desorption tower, an electric heater, a catalytic reactor and a chimney, wherein all the devices are arranged in a shelter; the induced draft fan provides the power of entire system, and one-level heat exchanger, desorption tower, second grade heat exchanger, electric heater, catalytic reactor connect gradually in proper order. The high-temperature tail gas of the catalytic reactor outlet pipeline is sequentially subjected to heat exchange with the secondary heat exchanger and the primary heat exchanger and then is connected with the induced draft fan, and the chimney is installed at the outlet of the induced draft fan and extends out of the shell of the shelter. The external dimension of the shelter is 6058 multiplied by 2438 mm. The square cabin is covered with 50mm thick polyurethane heat insulation boards on each side, the size of an internal clear space is 5800 multiplied by 2200 multiplied by 2100mm, and the square cabin is movable.
Preferably, the unloader is arranged beside the desorption tower.
An emergency cooling device is arranged at the air inlet of the desorption tower; the desorption tower adopts a side surface air inlet and side surface air outlet mode, airflow flows from bottom to top, and a pattern plate filled with activated carbon is arranged in the tower; the flow velocity of the gas in the desorption tower is 2-5 m/s.
The electric heater raises the temperature of the exhaust gas to 300-450 ℃.
The heat exchanger is arranged in a countercurrent mode. The heat exchanger is one of a tubular gas-gas heat exchanger, a plate gas-gas heat exchanger or a heat pipe gas-gas heat exchanger; the first-stage heat exchanger utilizes high-temperature tail gas at the outlet of the catalytic reactor to heat the regeneration air to 90-120 ℃, and the second-stage heat exchanger raises the temperature of the waste gas to 180-220 ℃.
The catalytic reactor is filled with noble metal Pt and Pb catalysts, and the airspeed is 10000-20000h-1。
The inlet of the catalytic reactor is provided with a gas distribution device.
The processing method using the device comprises the following steps: utilize the tripper to carry to the desorption tower with dumped active carbon in, the hot-air that utilizes the one-level heat exchanger is with dumped active carbon desorption, the organic waste gas of production heaies up through the second grade heat exchanger, then electric heater heats to catalytic temperature, the organic waste gas of desorption removes VOCs through catalytic reactor reaction, high temperature tail gas after the purification passes through second grade heat exchanger and one-level heat exchanger heat transfer in proper order, the regeneration air temperature that will promote respectively into the desorption tower and the VOCs-containing waste gas temperature that the desorption tower came out promote to preset temperature, discharge from the chimney through the draught fan at last.
When the air temperature at the air inlet of the desorption tower exceeds 120 ℃, the emergency cooling device is started to spray water mist for cooling, so that the temperature of the regenerated air does not exceed 120 ℃.
Has the advantages that: firstly, the system integrates desorption-catalytic combustion in a mobile shelter, the equipment is small in size, safe and reliable, the system can be rapidly moved to the side of VOCs treatment facilities in each plant area, waste activated carbon is disposed on the spot, the regenerated activated carbon can be reused, and no secondary pollution is caused. Secondly, the heat recovery efficiency is high, firstly, the high-temperature tail gas after catalytic reaction is utilized to preheat the regeneration air, the regeneration air enters the desorption tower after reaching the regeneration temperature, then the high-temperature tail gas is utilized to further raise the temperature of the desorbed waste gas to be close to the catalytic temperature, and finally, the electric heater is utilized to supplement and adjust the temperature of the flue gas, so that the optimal reaction temperature window is realized.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Fig. 2 is a schematic plan view of the apparatus.
The system comprises a fan 1, a primary heat exchanger 2, a desorption tower 3, a secondary heat exchanger 4, an electric heater 5, a catalytic reactor 6, a discharger 7, a chimney 8 and a shelter 9.
Detailed Description
The technical solution in the embodiments of the present invention will be described below with reference to the accompanying drawings of the present invention.
As shown in the figure, the in-situ treatment device for the waste activated carbon after absorbing the VOCs has the advantages that the source of the activated carbon is the waste activated carbon generated by VOCs treatment facilities of a certain printing plant, and the main components of waste gas are benzene, toluene, xylene and the like.
The device adopts a desorption-catalytic combustion process, and the main equipment comprises a discharger, a desorption tower, a primary heat exchanger, a secondary heat exchanger, an electric heater, a catalytic reactor, a draught fan, a PLC system and an auxiliary device, and is integrated in 1 standard square cabin.
A local disposal device for waste activated carbon after absorbing VOCs comprises a draught fan, a primary heat exchanger, a secondary heat exchanger, a discharger, a desorption tower, an electric heater, a catalytic reactor and a chimney, wherein all the devices are arranged in a shelter; the induced draft fan provides power for the whole system, and the primary heat exchanger, the desorption tower, the secondary heat exchanger, the electric heater and the catalytic reactor are sequentially connected; the high-temperature tail gas of the catalytic reactor outlet pipeline is connected with the secondary heat exchanger and the primary heat exchanger after being subjected to heat exchange in sequence, and then is connected with the draught fan, and the chimney is installed at the outlet of the draught fan and extends out of the shell of the shelter. (ii) a The external dimension of the shelter is 6058 multiplied by 2438 mm. The square cabin is covered with 50mm thick polyurethane heat insulation boards on each side, the size of an internal clear space is 5800 multiplied by 2200 multiplied by 2100mm, and the square cabin is movable.
Preferably, the unloader is arranged beside the desorption tower.
An emergency cooling device is arranged at the air inlet of the desorption tower; the desorption tower adopts a side surface air inlet and side surface air outlet mode, airflow flows from bottom to top, and a pattern plate filled with activated carbon is arranged in the tower; the flow velocity of the gas in the desorption tower is 2-5 m/s.
The electric heater raises the temperature of the exhaust gas to 300-450 ℃. The heat exchanger is a gas-gas tube type heat exchanger and is arranged in a countercurrent mode.
The heat exchanger is a gas-gas tube type heat exchanger and is arranged in a countercurrent way; the first-stage heat exchanger heats the regeneration air to 90-120 ℃, and the second-stage heat exchanger raises the temperature of the waste gas to 180-220 ℃.
Noble metals Pt and Pb catalysts are filled in the catalytic reactor, and the space velocity is 10000-20000h < -1 >.
The inlet of the catalytic reactor is provided with a gas distribution device.
When the air temperature at the air inlet of the desorption tower exceeds 120 ℃, the emergency cooling device is started to spray water mist for cooling, so that the temperature of the regenerated air does not exceed 120 ℃.
The air volume of the induced draft fan is designed to be 5000 Nm3H, wind pressure of 2KPa, maximum treatment capacity of 200kg/h of waste activated carbon, and concentration of non-methane hydrocarbon in inlet gas of not more than 10mg/m3。
According to the requirement of the unified specification of the project, the model number CAF60242 of the square cabin is selected according to GJB 6142 and 2007 military square cabin series type spectra, and the external dimension is 6058 multiplied by 2438 mm. The square cabin is covered with 50mm thick polyurethane heat insulation boards on each side, and the size of an internal clear space is 5800 multiplied by 2200 multiplied by 2100mm (length multiplied by width multiplied by height).
The device has small equipment volume, is safe and reliable, can be quickly moved to the side of VOCs treatment facilities of each factory, treats the waste active carbon on the spot, solves the problem of dangerous waste transportation and treatment, and does not produce secondary pollution.
Example 1
Utilize the tripper to carry to the desorption tower with dumped active carbon in, the hot-air that utilizes the primary heater is with dumped active carbon desorption, the organic waste gas of production is through the secondary heater intensification, then the electric heater heats to catalytic temperature, the organic waste gas of desorption removes VOCs through catalytic reactor reaction, high temperature tail gas after the purification passes through secondary heat exchanger and primary heat exchanger heat transfer in proper order, the regeneration air that will advance the desorption tower respectively and the waste gas that contains VOCs that the desorption tower came out promote to preset temperature, discharge from the chimney through the draught fan at last.
Wherein the flow velocity of the gas in the desorption tower is 2 m/s. The electric heater increases the exhaust gas temperature to 300 ℃. The first heat exchanger heats the regeneration air to 90 ℃, and the second heat exchanger raises the temperature of the waste gas to 180 ℃. The catalytic reactor is filled with a noble metal Pt catalyst, and the airspeed is 10000h-1。
Example 2
Utilize the tripper to carry to the desorption tower with dumped active carbon in, the hot-air that utilizes the primary heater is with dumped active carbon desorption, the organic waste gas of production is through the secondary heater intensification, then the electric heater heats to catalytic temperature, the organic waste gas of desorption removes VOCs through catalytic reactor reaction, high temperature tail gas after the purification passes through secondary heat exchanger and primary heat exchanger heat transfer in proper order, the regeneration air that will advance the desorption tower respectively and the waste gas that contains VOCs that the desorption tower came out promote to preset temperature, discharge from the chimney through the draught fan at last.
Wherein the flow rate of the gas in the desorption tower is 5m/s, and the temperature of the waste gas is increased to 450 ℃ by the electric heater. The first heat exchanger heats the regeneration air to 120 ℃, and the second heat exchanger raises the temperature of the exhaust gas to 220 ℃. The catalytic reactor is filled with a noble metal Pb catalyst with the airspeed of 20000h-1。
Claims (6)
1. The utility model provides a waste activated carbon's after absorption VOCs device of disposing in situ which characterized in that: the device comprises a draught fan, a primary heat exchanger, a secondary heat exchanger, a discharger, a desorption tower, an electric heater, a catalytic reactor and a chimney, wherein all the devices are arranged in a square cabin; the induced draft fan provides power for the whole system, the primary heat exchanger, the desorption tower, the secondary heat exchanger, the electric heater and the catalytic reactor are sequentially connected, and the unloader is arranged beside the desorption tower; an outlet pipeline of the catalytic reactor is sequentially connected with the secondary heat exchanger and the primary heat exchanger and then connected with a draught fan, and a chimney is arranged at the outlet of the draught fan and extends out of the shell of the shelter; the external dimension of the shelter is 6058 multiplied by 2438 mm; the square cabin is covered with 50mm thick polyurethane heat insulation boards on each side, the size of an internal clear space is 5800 multiplied by 2200 multiplied by 2100mm, and the square cabin is movable.
2. The in-situ treatment device of the waste activated carbon after absorbing VOCs of claim 1, wherein an emergency cooling device is arranged at the air inlet of the desorption tower; the desorption tower adopts a side surface air inlet and side surface air outlet mode, airflow flows from bottom to top, and a pattern plate filled with activated carbon is arranged in the tower; the flow velocity of the gas in the desorption tower is 2-5 m/s.
3. The apparatus as claimed in claim 1, wherein the electric heater increases the temperature of the waste gas to 300-450 ℃.
4. The in-situ waste activated carbon treatment device for adsorbing VOCs according to claim 1, wherein the heat exchanger is one of a tube type gas-gas heat exchanger, a plate type gas-gas heat exchanger or a heat pipe gas-gas heat exchanger; the first-stage heat exchanger utilizes high-temperature tail gas at the outlet of the catalytic reactor to heat the regeneration air to 90-120 ℃, and the second-stage heat exchanger raises the temperature of the waste gas to 180-220 ℃.
5. The apparatus as claimed in claim 1, wherein the catalytic reactor is filled with noble metals such as Pt and Pb, and has a space velocity of 10000--1。
6. The apparatus of claim 1, wherein the catalytic reactor inlet is provided with a gas distribution device.
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| CN202023000920.3U CN214320176U (en) | 2020-12-14 | 2020-12-14 | Abandonment active carbon's behind absorption VOCs device of dealing with on spot |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112452314A (en) * | 2020-12-14 | 2021-03-09 | 江苏省环境工程技术有限公司 | In-situ treatment device and method for waste activated carbon after VOCs adsorption |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112452314A (en) * | 2020-12-14 | 2021-03-09 | 江苏省环境工程技术有限公司 | In-situ treatment device and method for waste activated carbon after VOCs adsorption |
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